Finitely presented kernels of homomorphisms from hyperbolic groups onto free abelian groups

Robert Kropholler, Claudio Llosa Isenrich

For every $m\ge 2$ we produce an example of a non-hyperbolic finitely presented subgroup $H<G$ of a hyperbolic group $G$, which is the kernel of a surjective homomorphism $ϕ: G\…